Alan's hair was 15 centimeters long after his last haircut, and it grows 7 centimeters every year. How many years will it take until Alan's hair is 43 centimeters long?

4 years

Step-by-step explanation:

After his haircut he has 15 centimetres of hair, this is our origin. If we take 15 + 7 and multiply it by 4 then our answer would be 43  

4+n=5

step-by-step explanation:

this is because the four is four hours and the n represents the 1 extra hour over the weekend.

b= i'm srry i don't know that one.

4+n=5 n=1 because if vernon plays 5 hours a week then 4+1=5 hours.

hope this : )